Sieving Machine
Enclosed Riffle Sample Divider Sealed Riffle Splitter for Laboratory Material Reduction
Item Number : KT-MF
Price varies based on specs and customizations
- Feed Particle Size Range
- ≤1 mm to ≤13 mm
- Chute Slot Width Range
- 5.0 mm to 32.0 mm
- Total Number of Chutes
- 12, 16, 24, or 32 Chutes
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Product Overview
This enclosed sample preparation instrument delivers representative sample reduction of bulk particulate materials, dry granular solids, and mineral aggregates. Engineered to meet strict laboratory homogenization and sub-sampling standards, the equipment divides granular mixtures into two functionally identical, unbiased sub-samples through a calibrated series of opposing chutes. Its multi-point dividing geometry guarantees high compositional uniformity while significantly minimizing manual division errors, making it an essential baseline tool for high-precision analytical laboratories.
Designed specifically for demanding analytical testing facilities, the unit serves critical workflows in coal processing, metallurgy, mining assaying, geology, construction materials, and environmental engineering. By isolating dry and friable particulates within an enclosed body, this system allows operators to perform repetitive sample reductions without releasing hazardous airborne dust or losing crucial ultrafine fractions. Whether configured for coarse aggregate splitting or fine mineral powder division, the system provides consistent and verifiable subsample integrity across continuous sampling workflows.
Manufactured from heavy-duty industrial materials, the apparatus provides exceptional structural rigidity and resistance to abrasive material wear. The robust mechanical construction ensures that chute dividing angles, slot dimensions, and receiver alignments remain fixed throughout rigorous production-grade service. Available in both corrosion-resistant stainless steel and reinforced galvanized sheet construction, this laboratory divider offers dependable service life, straightforward cleaning, and repeatable sampling precision under continuous industrial laboratory operations.
Key Features
- Totally Enclosed Dust-Tight Housing: Built with sealed access covers and precision-fitted sample receiving pans, this unit completely captures airborne respirable particulates and ultrafines during the pouring and dividing process, protecting laboratory personnel and preserving critical analytical fractions.
- Precision Multi-Slot Dividing Mechanism: Calibrated dividing slots alternate in opposite directions at steep discharge angles, dividing the incoming bulk stream into two equal, representative halves in a single pass with maximum compositional uniformity.
- Abrasive- and Corrosion-Resistant Build Options: Available in premium stainless steel for high-purity chemical assaying and moisture-sensitive samples, or heavy-gauge galvanized steel for cost-effective, high-throughput mineral and aggregate processing.
- Broad Particle Size Versatility: Engineered to accommodate diverse feed granulometry ranging from fine powders (≤1 mm) up to coarse mineral fragments (≤13 mm), matching specific standard test method tolerances without chute clogging or bridging.
- Multi-Standard Chute Geometric Alignment: Offers selectable slot widths from 5 mm up to 32 mm with chute counts ranging from 12 to 32 slots, strictly fulfilling domestic and international coal chemistry and mineral preparation standards.
- Smooth, Low-Friction Discharge Surfaces: Electropolished or precision-formed chute interiors prevent particulate adhesion and cross-sample holdover, enabling rapid dry cleaning and zero contamination between sequential laboratory batches.
- Ergonomic Drawer and Receiver Fit: Custom-contoured receiving pans seat flush against the lower housing body, preventing sample leakage, spillage, or ambient air drafts from altering light-fraction distributions during drop cycles.
- Simple Mechanical Zero-Maintenance Operation: Operates entirely by gravitational flow without requiring electrical power, pneumatic connections, or complex electronic components, providing infallible reliability in both benchtop laboratories and remote field testing stations.
Applications
| Application | Description | Key Benefit |
|---|---|---|
| Coal Quality Verification & Proximate Analysis | Sub-sampling crushed run-of-mine coal, washed fines, and coke breeze to determine calorific value, ash content, volatile matter, and total moisture. | Retains volatile moisture and critical superfine ash components through sealed dust containment, ensuring high compliance with thermal fuel testing specifications. |
| Geological Exploration & Ore Assaying | Splitting drill core crushings, pulverized rock samples, and metallic ores prior to XRF, ICP-OES, and fire assay procedures. | Delivers unbiased multi-point splitting without cross-sample contamination, preserving geochemical grade accuracy across heavy mineral matrices. |
| Metallurgical Sinter & Pellet Testing | Homogenizing and reducing iron ore fines, direct reduced iron (DRI), sinter feed, and fluxing agents for physical and chemical analysis. | Resists continuous abrasive wear from high-density, sharp-edged particles while maintaining strict dimensional accuracy across all dividing chutes. |
| Cement & Aggregate Quality Control | Dividing clinker, raw meal, crushed limestone, sand, and gravel for granulometric sieve analysis and compressive strength testing. | Ensures representative distribution of coarse and fine aggregate fractions without slot clogging, fulfilling stringent civil engineering construction standards. |
| Chemical Catalysts & Fertilizer Granules | Splitting homogeneous synthetic beads, extruded catalyst carriers, prilled urea, and mixed granular agricultural nutrients. | Stainless steel contact surfaces prevent metallic contamination and resist chemical degradation, safeguarding purity during high-value product verification. |
| Environmental Soil & Solid Waste Sampling | Dividing dry contaminated soils, incinerator bottom ash, and industrial sludge granules prior to heavy metal and hazardous leachate testing. | Sealed enclosure eliminates operator exposure to toxic dust and volatile particulate hazards while securing chain-of-custody analytical reproducibility. |
Technical Specifications
Equipment Model Configurations
| System Identifier | Enclosure Type | Material of Construction | Operational Mode | Application Compatibility |
|---|---|---|---|---|
| KT-MF-1A | Open Hopper | Heavy-Duty Galvanized Steel | Gravity Riffle Flow | General industrial screening, dry aggregates, and non-hazardous ores |
| KT-MF-1AM | Sealed Dust-Tight Enclosure | Heavy-Duty Galvanized Steel | Enclosed Gravity Riffle Flow | Dust-prone coal testing, high-throughput mineral sampling, standard labs |
| KT-MF-2B | Open Hopper | Premium Grade Stainless Steel | Gravity Riffle Flow | Non-corrosive chemicals, food-grade granules, non-dusting geology |
| KT-MF-2BM | Sealed Dust-Tight Enclosure | Premium Grade Stainless Steel | Enclosed Gravity Riffle Flow | High-purity assaying, corrosive minerals, volatile moisture coal analysis |
Coal Chemistry Standard Dimensional Specifications (煤化标准)
| Model Size Code | Maximum Feed Particle Size (mm) | Chute Slot Width (mm) | Total Number of Chutes | Splitting Ratio |
|---|---|---|---|---|
| KT-MF Large (大号) | ≤13 | 20.7 | 16 | 1:1 Representative Division |
| KT-MF Medium (中号) | ≤6 | 8.0 | 24 | 1:1 Representative Division |
| KT-MF Small (小号) | ≤3 | 5.0 | 32 | 1:1 Representative Division |
Coal Chemistry New Standard Dimensional Specifications (煤化新标准)
| Standard Specification Index | Maximum Feed Particle Size (mm) | Chute Slot Width (mm) | Total Number of Chutes | Recommended Sample Matrix |
|---|---|---|---|---|
| KT-MF Standard 4# | ≤13 | 32.0 | 12 | Coarse run-of-mine coal, crushed stone, coarse gravel |
| KT-MF Standard 3# | ≤6 | 15.0 | 16 | Crushed coal, metallurgical coke, medium-grain minerals |
| KT-MF Standard 2# | ≤3 | 8.0 | 24 | Washed coal fines, crushed metallic ores, raw clinker |
| KT-MF Standard 1# | ≤1 | 5.0 | 32 | Pulverized coal, fine dry powders, geological assay dust |
Construction and Environmental Details
| Specification Parameter | Technical Detail |
|---|---|
| Discharge Chute Incline Angle | ≥60° Precision Slope for Rapid Gravitational Clearance |
| Division Uniformity Tolerance | ±1.0% between dual receiving containers on compliant feed |
| Receiving Vessel Configuration | Dual slide-in modular pans with integrated dust-seal lip |
| Hopper Access Mechanism | Top-loading enclosed flap / seal cover for zero fugitive dust |
| Surface Treatment | Passivated / mirror-buffed stainless steel or zinc-plated galvanized finish |
Why Choose This Product
- Engineered Sampling Unbiasedness: Every unit is manufactured with mathematically spaced, mirrored chute channels to ensure that each gravitational split yields true 1:1 sample halves, eliminating operator-induced sampling bias and preserving data accuracy for high-stakes regulatory auditing.
- Total Laboratory Environmental Safety: Unlike standard open-trough riffles that exhaust hazardous respirable crystalline silica, coal dust, or chemical powders into the working environment, this fully sealed system traps fine particulate matter within the enclosure, maintaining environmental compliance and technician safety.
- Exceptional Mechanical Rigidity & Longevity: Heavy-gauge metal wall construction ensures that the slot dimensions and divider apexes never warp, distort, or spread under repeated heavy impacts from coarse rock and coal feedstocks, delivering years of dependable volumetric precision.
- Comprehensive Standard Compliance: Whether adhering to legacy testing standards or updated international protocols, the diverse selection of chute widths (from 5 mm to 32 mm) enables immediate laboratory standardization across multi-facility operations without process deviation.
- Rapid Disassembly and Decontamination: The streamlined interior geometry and removable collection trays allow technicians to perform complete, residue-free dry cleaning in seconds using a soft brush or compressed air, significantly boosting throughput in high-volume testing labs.
Contact our technical sales team today to request a quotation or discuss custom slot configurations tailored to your laboratory testing standards.
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